As a follow-up to Scott's comments on humidity, everything down here
starts growing when the RH starts hitting the 65%+ mark at 77 or 78degF in
the evenings. I wish I could maintain this condition year 'round. At
present the RH is at 45 outside. But in another three to four weeks summer
will be with us.
On your next trip down this way you should stop to visit Ron Gagliardo at
Atlanta Botanical. They have succeeded in creating an extremely well
regulated tropical environment in the Conservatory there. Its worth a
look and you might learn a few simple "tricks".
Don Burns Plantation, FL USA Zone 10b